Loose-leaf binder.



W. F. KROHIVIER.

LOOSE LEAF BINDER.

APPLICATION FILED MAR. so. 1918.

Patented Feb. 11, 1919.

WILLIAM F. KROHMER, OF CHICAGO, ILLINOIS, ASSIGNOR TO GOESLITHOGBAJPHING- COMPANY, OF CHICAGO, ILLINOIS, ACORPORATION OF ILLINOIS.

LOOSE-LEAF BINDER.

Specification of Letters Patent.

Patented Feb. 11, 1919.

7 Application filed March 30, 1918. Serial No. 225,623.

To all whom it may concern:

Be it known that 1, WILLIAM F. KROH- MER, a citizen of the UnitedStates, and a resident of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inLoose-Leaf Binders; and- I do hereby declare that the following is afull, clear, and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to certam improvements in the details ofconstruction and arrangement of parts, for loose leaf binders. One ofits objects is the production of a novel, simple and eflective binderfor containing ordinary loose leaf sheets, bills, 1nvoices, or the like,whereby when the sheets are inserted and bound, the same will resent amore convenient article for handling, a more sightly appearance, andpresent no rough edges or projecting parts which otherwise would beliable to lacerate the hands of the user and cause inconvenience.

The objects and advantages of my invention will more fully appear fromthe following description and the a pended claims.

Referring now to the rawings:

Figure 1 is a perspective view of the inside portion of the binder, thetwo covers being spread apart, showing the binder in condition for thereception of the loose leaves.

Fig. 2 is a transverse, sectional view of a portion of the binder, afterthe leaves have een inserted and the parts permanently secured together.

Fig. 3 is a horizontal, sectional View, taken upon the plane of thedotted line 33 of Fig. 2 showing one of the binding posts over which theloose leaves are impaled.

In said drawing, the letter A represents one cover of the binder, B theother cover, suitably bound together by a flexible back 0. G representsthe group of loose leaves.

The covers A and B are preferably made of the usual cardboard paperstock, the back C is of suitable binding cloth or fabric, which extendsover the outside surfaces of .the backs A and B, as shown at l and 2,be-

ing secured to the covers A and B by mucilage or othersuitable meansfamiliar to persons sklllod 1n the art. Secured to the inner edge 3 ofthe cover A, is a two member retaining strip, designated as a whole bythe letter D. A similar strip designated as a whole by the letter E issimilarly positioned with respect to the inner edge 4 of the cover B.The retaining strip D is composed of a relatively narrow strip 5 and asecond strip 6, of card-board, thin metal or other suitable material,covered with cloth 7. This cloth extends onboth sides of the strip 6 andof the strip 5 in such form as to be secured together and to form ahinge at 8, and, again secured together to form a second hinge 9.

The cloth 7,. after forming a hinge 9 between the retaining member D andthe cover A, is extended outwardly from the edge 3 and over a portion ofthe outside of the cover A beneath the cloth cover 1, as clearly shownat 10 in Fig. 2. Thus the cloth 7 forms a finish for the two portions 5and, 6 of the retaining member D, forms also a hinge at .8 connectingthese two members 5 and 6 together, and also forms a hinged connectionbetween them and the cover A.

Similarly, binding cloth 11 is extended at 12 (Fig. 2) between theopposite inner rear portion of the cover B and its cloth covering 2, toform a hinge 13, and then passes around the board member 14 of theretaining member E, forming a hinge 15 between the member 14 and thesecond member 16 of the dual retaining member. E.

F is a stud or pin provided with a sharpened, bifurcatin end adapted topenetrate the loose leaves so that the latter may be impaled upon thepin in the usual way. At the other end of the pin F is a suitable heador shoulder f. The pin F passes through an aperture in the member 14 andthen said member is folded over on the hinge 15, to and against themember 16. Suitable adhesive means, such as glue, for instance,indicated by the heavy line at 17, will cement or glue thetwo members 14and 16 together, in the manner shown in Fig. 1. Thus the head orretaining shoulder f of the pin, is entirely concealed, and theretaining member E is thus made more firm and strengthened by the factthat its two parts 14 and 16 are secured together.

A suitable aperture 18 is made in the part 5 of the other retainingmember D, so located as to register with the pin F when through theaperture 18 and then the points of the pin F are spread in oppositedirections, along the back portion of the part 5,

as indicated more clearly in Fig. 3; the

sharpened bifurcated end of the pin F being spread or separated, asshown.

After the oints are thus spread apart, the part 6 o? the retainingmember is folded over upon the hinged line 8 and se-' cured to the part5 by cement or other suitable means as indicated by the heavy line 19.Thus the retaining member D becomes narrowed and strengthened by havingits two parts, 5 and 6, secured and cemented together, and the ends ofthe pin F become covered and concealed by the part 6.

This makes a strong, durable and neatly appearing device, andpermanently secures the bound leaves G between the two retaining membersD and E.

A feature of this construction is that when the leav'es'G are thuspermanently bound in between the retaining members D and E,

4 the three parts form in themselves a unitary and complete structure,with a protecting, fieziible back unattached directly thereto; at thesame time the covers A and B are flexibly 'attached both to the unitarybinding structure and to the back G'by means of the hingedcloth bindingconnection described.

Thus it will be found that the book has great convenience in handling,at the same time great stability in the matter of holding the looseleaves G in permanently bound condition.

Of coure, slight changes may be made in the details of construction, asfor example, in the head 7 of the pin F. This head is shown asrelatively flat and thin, but it will be recognized that the same may beof other form or contour, so long as it serves the function of holdingthe pin F to the part 14:. Likewise, slight structural changes may bemade in the binding cloth arrangement, without departing from the spiritor principle of the invention; the form shown,

however, is recommended as preferable,

based upon actual use thereof.

I claim as my invention:

1. A permanent loose leaf binder comprising a binding post having oneend sharpened and bifurcated, a shouldered head on the other end of saidpost, a binding strip in two sections hinged together, a blnding postaperture in one section, the post being held in the apertured section byfolding the unapertured section over the post head and to a flexibleback member, a binding post;

having at one end a head, the other end of said post being sharpened andbifurcated, a pair of binding strips, each of two sections hingedlysecured together along their longitudinal adjacent edges, one section ofeach strip being hingedly secured to a cover adjacent theback member,also an aperture for the binding post in each of said sections hinged tothe back member, the free section, of each binding strip being adaptedto be folded over the section to which it is hinged to cover and concealthe end of the post, and adhesive means for permanently securing saidfolded over sections upon the sections to which they are hinged.

In testimony that I claim the foregoing as my invention I aifix mysignature in the presence of two witnesses, this 23rd day of March A. D.1918.

WILLIAM F. KROHMER.

